Title

Failure Of An Internally Threaded Structure: The Valve Centre Spool

Keywords

Brittle fracture; Failure criterion; Internally threaded centre-spool; Stress intensity factor; Valves

Abstract

The failure of the internally threaded centre spool of large valves is investigated. Brittle fracture occurred at the root of the internally threaded area. Several visual tests were performed. Visual investigation shows that the failure occurs on the last thread engaged with the bolt. Primary finite element method analysis shows that the last thread root has the highest stress concentration and opening mode of fracture mechanics. Redesign optimization and a parametric study are carried out. Reduction of the stress concentration is achieved and so the fracture is prevented.

Publication Date

12-1-2002

Publication Title

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

Volume

216

Issue

12

Number of Pages

1157-1163

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1243/095440602321029391

Socpus ID

0036964735 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0036964735

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